On the contrary, I read the cartoon as being very complimentary, as it espouses the virtue of egalitarianism. Why should someone on the internet know that you're a dog? If you're campaigning for the eradication of cats, perhaps. But even then, shouldn't we assume everyone is personally motivated and that a good argument is a good argument?

There's an impossible balance to be found between total transparency and not having to reveal all truths about your being, such as your species.